Dave Irvine-Halliday

Rolex Laureate, 2002

Electrical engineer Dave Irvine-Halliday realised that a single 0.1 watt, white-light emitting diode supplies enough light for a child to read by. The simple but revolutionary technology supplied to homes by his Light Up The World Foundation can light an entire rural village with less energy than that used by a single, conventional, 100 watt light bulb.